González-Martín Oscar, Veltri Mario
Int J Periodontics Restorative Dent. 2021 Mar-Apr;41(2):245-251. doi: 10.11607/prd.4564.
This study aimed to assess how frequently the maxilla anatomy allows for lingualized immediate implants in the central incisor region with a screw channel that has an ideal distance of 1.5 mm from the incisal margin. The effect of abutments with angle correction on case selection will also be verified. A retrospective cross-sectional study of 181 CBCT scans was carried out. Using an implant-planning software, implant placement was simulated in the lingual aspect of the socket. The location of the prospective screw channel was registered as incisal, lingual, or facial. The angle between the actual screw channel and the position of the ideal one was calculated. The effect of angle correction on allowing an ideal screw channel configuration was computed. Out of 161 eligible cases, 144 presented favorable anatomy for an immediate implant. The screw channel had an incisal position in 40 cases (28%), a lingual position in 60 cases (42%), and a facial position in 44 cases (30%). The screw channel could be placed at the planned distance from the incisal edge in 35 cases (24%). The position was unfavorable in the remaining 109 cases. In 103 of these cases, an abutment with an angled screw channel could make the conditions feasible. Within the simulated conditions, a majority of maxillary central incisors present favorable ridge anatomy for lingualized immediate implant placement. Achieving a proper location of the screw channel requires abutments with angle correction in a majority of cases.
本研究旨在评估上颌骨解剖结构在中切牙区域允许舌侧即刻种植体植入的频率，该种植体的螺钉通道与切缘的理想距离为1.5mm。还将验证带角度矫正的基台对病例选择的影响。对181例CBCT扫描进行了回顾性横断面研究。使用种植体规划软件，在牙槽窝的舌侧模拟种植体植入。将预期螺钉通道的位置记录为切侧、舌侧或颊侧。计算实际螺钉通道与理想螺钉通道位置之间的角度。计算角度矫正对实现理想螺钉通道构型的影响。在161例符合条件的病例中，144例具有适合即刻种植的有利解剖结构。螺钉通道位于切侧的有40例（28%），位于舌侧的有60例（42%），位于颊侧的有44例（30%）。35例（24%）的螺钉通道可放置在距切缘计划的距离处。其余109例的位置不理想。在其中103例中，带角度螺钉通道的基台可使条件可行。在模拟条件下，大多数上颌中切牙具有适合舌侧即刻种植体植入的有利牙槽嵴解剖结构。在大多数情况下，需要带角度矫正的基台来实现螺钉通道的正确位置。
